Since in the future we couldn't depend on fiat anymore. More and more we are going near to a new payment method. There are stores that accepts bitcoin as payment and it will apply to all as time goes by. FedEx is just smart on investing for the company's future.
I think fiat will remain forever and will not be replaced by Bitcoin. bitcoin will be great in the digital world and the rest of the fiat is master. my advice is to take advantage of the opportunities that exist as well as possible.